Shoe machinery



Aug 24, 1943- c. l.. LOGI-:MANN 2,327,806

SHOE MACHINERY Filed Feb. 1 5, 1945 28 f .fr 30 im 27'PE INVENTOR /7 i A Trae-M5545.

Patented Aug. 24, 1943 UNITED STATES PATENT OFFICE A -v 2,327,806 l E sHoE MACHINERY Clarence L. Logemann, Milwaukee, Wis. Appncanon February 15, 194aseria1Nc. 475,889

12 Claims.

The present invention relates in general to improvements in the art of shoe manufacture, and relates more specifically to improvements in the construction and operation of shoe making machinery, and especiallyequipment for dressing and finishing shoe heels after they have been attached to the soles and uppers.

An object of the invention is to provide an improved heel dressing assemblage which is simple in construction and highly efficient in use.

In the shoe manufacturing industry, it has long been customary to dress or scour the upper outer portions of the shoe heels, with the aid of sanding wheels against which these heel portions are pressed by an operator after the uppers have been applied to the soles and heels. The sanding wheels used for this scouring operation are rotatable at relatively high speed and are protected by a guard casing extending partially thereover,` and unless the loperator exercises eX- treme care and patience, the edges of the sanding wheels frequently come in contact with the outwardly extending uppers formed of leather or other materials, adjacent to the top of the heels, thus scufling or otherwise damaging these uppers. In order to avoid such injury to the uppers, the operators were heretofore obligated to Work rather slowly and carefully, thus loosing considerable time, and while this annoyance has existed for many years, no satisfactory solution of the problem has heretofore been found.-

It is therefore a more specific object of my present invention to provide improved mechanism of simple and durable construction, which will permit such heel scouring or dressing operations to be carried on more rapidlyandwithout danger of damaging the shoe uppers, and will also produce more uniform heel seats and will thus add to the quality of the shoes.

Another specific object of this invention isto provide an improved abrasive wheel guard assemblage which is more flexible in its adaptations, and which is moreover cooperable with standard sanding wheel and guard casing assemblages `of different sizes.

Still another specific object of the invention is to provide a new and useful device for sanding the external curved surfaces of the shoe heels, which will automatically and positively prevent the abrasive surfaces from contacting the uppers of the shoes to which the heels are applied, and

which will moreover simplify the heel scouring A further specific object of my invention is to provide an improved safety device for shoe heel dressing wheels, which will materially enhance the production of shoes with utmost safety and at minimum cost. l l i These and other specific objects and advantages of my invention will be apparent from the following detailed description.

A clear conception of the several features constituting my present improvement, and of the mode of constructing and of,` utilizing abrasive wheel safety guards embodying the invention, may be had by referringtothe drawing accompanying and forming a part of this specification wherein like reference characters designate the same or similar parts in the various views.

y Fig. 1 is a front and side perspective view of one of my improved abrasive wheel guard assemblages showing a vfragment of the main guard casing, and also showing a fragmentof a shoe heel `co-acting with a fragment of an abrasive wheel in dot-and-dash lines;

Fig. 2 is a top View of the assemblage of Figi, showing the improved device suspended .from a fragment of the mainguard casing which is shown in section,\and also showing the abrasive wheel in dot-and-dash lines;

Fig. 3 is a side view of the same assemblage, showing the limits of angular adjustment of the two guard plates which cooperate withthe opposite sidesof the wheel, in solid and dot-anddash lines; and f,

Fig. 4 is a section through Athe improved guard assembly taken along the line` 4 4 and looking rearwardly.

While the invention has been shown and described herein as being especially adapted for application to the heel scouring Wheels of shoe making machinery, it is not my desire or intent to unnecessarily restrict the scope or utility ,of the improvement, features of which may obviously be advantageously-applied to other types of sanding and abrasive equipment.

Referring to the drawing, the improved heel scouring assemblage shown therein comprises in general a pair of approximately parallel guard plates 6, I adapted for disposition on opposite sides of the lower front portion of a sanding Wheel 8, andV being rigidly attached to the front v ends of suspension rods 9, I0 respectively; a pair of laterally spaced blocks I I having alined transverse' upper openings I2 adjustably coacting with a horizontal pivot shaft i3, andfalso being provided With lower through openings I4 within which the rear portions of the rods 9, iii are adjustably secured; a U-shaped frame or bracket I5 having alined holes I6 near its opposite. ends and in which the extreme'ends of the pivot shaft I3 are confined by collars I'I secured to v,the shaft I3; an attaching stud I B and-nuts I9 for adjustlower side notch 2d within which the rear end` of the longer suspension rod 9 is loosely disposed and floatable.

The front and lower edge portions 25 of the guard plates 6, 'I are preferably arcuately curved and chamfered as shown so that these plates will present relatively thin curved edges extending along and normally disposed outwardly beyond the Aadjacent curved edges of the wheel 8 and the plates, 6, TI should also Abe. cut back to prevent drag on the Awheel andmay be rigidly attached to their respective rods 9, I0. by screws 25 or otherwise, as shown in Figs. 1, 2 and 3.. The suspension rod I is somewhat shorterk than the rod 9 since the latter engages the notch; Ell/,but these rods 9, I8 are normally maintained paral lel to each other by'means offset screws 21 coacting directly therewith at 4t'hefopenings i4, and other set screws 28 coacting with the pivot shaft I3 at the openings I2. Upon release Vof the set screws 21, the rods '9., I8 may be adjusted forwardlyand rearwardly withinv the openings I!! and relative to the blocksI'I, and upon release of the .set screws 2,8, the blocks II :may obviously be `adjusted along andabout the axis of the pivot shaft i3, but normally all kof the set screws 21', 28 should be driven home. kThe collars vII are Aalso adjustably secured to the shaft I3` by meansof similar set screws Alil. as shown in Fig. 2, but when these collars' have been properly positioned so as to permit oscillation of the shaft I3: without permitting undesirable longitudinal shifting thereofL they should Anot be released except for dismantling lof the assemblage.

The U-shaped frame or bracket I fromy v'vhichthe guard'plates 6, I, blocks II, an-d shaft I3 are swingably suspended, should be of relatively st rongand rigid constructiom and the mounting stud I8 is preferalflly` disposed centrallyof the bracket I5 and provides a swivel support about which the bracket may be angularly adjusted by merelyr releasing the front clamping nut I9. The plate ZI which limits the swinging motion of the guard plates 6, 1, besides being vertically ad-` justable along the clamping cap screw 22, may also be adjusted angularly about the axis of this screw;` and the slot 23 should be of sufficient widthl to permit slight free swinging yrno'ven'ient of the guard vkplates 6, 1 in vertical planes toward'and away from the central axis of theabrasive wheel 8. This free swinging motion is importantv in order to permit the shoe heels 29 to be rolled in peripheral contact with the wheel 8 which is rotatable at high speed about the axis of its supporting shaft 38 in a well known manner.

During normal use of theimproved apparatus, the guard assemblage should rst be properly mounted upon the main wheel guard 28 with the' aid of the'stud I8 and nuts i8, with the guard plates 6, 'i on opposite sidesof the wheel 8. The guard plate 1 should then be adjusted with the aid of the set screws 2l, 28 and by manipulation of the cap screw 22, so as to properly position the edge portions A25 o-f the guard plates with respect to` the -peripheral edges of the abrasive wheel 8, substantially'as shown inFigs. 2 and 3. ',Ifhe free rotation of the wheel 8 should not be interfered with and the wheel 8 should not contact the guard plates 5, 'I, and theseplates should be free to swing slightly in vertical planes by virtue of the formation of the slot 24 in the plate 2 I.

The'position of the plates 6, 'I may obviously be guard plates 6, 'I in vertical planes will be simultaneous.

When such proper mounting and adjustment of theaSSemblage has been effected, the oper- `atormay bring the heels 29 of the successive shoes .in engagement with the periphery of the abrasive `wheel 8 and may roll the heel so as to iinish the outer surface thereof as indicated in Fig. 41, and during 'suchnishing orscouring of thejlfieels 28, the edgejportions 25 vof the guard plates 6, 'I will `coact withgthe' recesses'in the shoes `between the'heel ,portion of the ysolejand the upper. This coaction `will prevent the uppers of the shoes from beingbrought intocontact with the abrasive surface 'of the wheel 8, andthe reason for providing two guard plates S, "l, one on each side of the wheel 8, 4is that the Aoperator usually finishes one side of each heel -29 adjacent to one peripheral edge of the `wheel 8, and then reverses the shoe vso `vas to finish the other side of the heel adjacent to the other peripheral Yedge of the wheel 8, The slight rockingmotion permitted by the limit stop '24 will permitthe opera ator to press the heels 28 into snug lengagement with the rabrasive surface of the wheel v8,' during the rolling of the v-heeld-uring the scouring operations, and without the flexibility afforded by this vertical swinging movement, it may be impossible' :for the `operator to thus effect' contact between the wheelk and heel and to avoid the grinding'of local irregularities into the heel. It will thus be noted that the assemblage is extremely flexible in its adaptations, and enables 4the operator to quickly `scour the successive heels without danger of having the abrasive wheel damage the'uppers of the'lshoe's with which the heels 29 are assoeiated. v

From vthe,foregoing detailed description it will be apparentthatmy present invention provides an improved abrasive wheel guard assemblage which is simple and durable'in construction 'and which is moreoverfhighly efficient in operation; The `various adjustments provided in the assemblage will lzvermitthev use thereof in conjunction with wheels of dilerent `sizes and having the main guards disposed different distances from theaxes of rotation thereof', and the assemblage can obviously bev readily y*constructed* of relatively stockl Vmaterial and may be quickly assembled andA dismantled. The improved device may obviously be applied to existing scouring machines and may be manufactured at moderate cost; The

' invention has gone into highly successful commercial use and has greatly enhanced the speed at which the heels can be scoured while positively preventing damaging of the shoe uppers such as has heretofore frequently occurred. In

actual practice, the present improvement has actually vsimplified the heel scouring operation by at least to 45 per cent, 'and has resulted in the production of heel seats which'are far superior to those resulting from the prior Ymethods whereby the application of the work to the wheels was unrestrained byguard plates such as shown and described herein.

It should be understoodthat it is notv desired to limit this invention to the exact details of construction Or to the precise mode of use, herein shown and described, for various modifications within the scope of the claims may occur to persons skilled in the art.

I claim:

l. In combination with an abrasive wheel rotatable about an axis, a guard plate disposed adjacent to a side of the wheel and having an arcuate edge projecting outwardly beyond the adjacent peripheral edge of the wheel, and mounting means for said plate vformed to produce lim ited free swinging thereof toward and away from the wheel axis by work pressed against the abrasive wheel surface.

2. In combination with a wheel having an abrasive peripheral surface and being rotatable about a fixed axis, a guard plate disposed perpendicular to said axis adjacent to a side of the wheel and having an arcuate edge projecting outwardly slightly beyond the adjacent peripheral edge of the wheel, and mounting means for said plate formed to produce limited free swinging thereof about an axis disposed parallel to the wheel axis toward and away from the latter by work pressed against said abrasive wheel surface.

3. In combination with an abrasive wheel rotatable about an axis, a guard plate disposed adjacent to a side of the wheel and having an arcuate edge projecting outwardly beyond the adjacent peripheral edge of Vthe wheel, mounting means for said plate formed to produce limited free swinging thereof toward and away from the wheel aXis bywork pressed against the abrasive wheel surface, and means for effecting fixed adjustment of said plate both toward and away from the adjacent side of the wheel and toward and away from the wheel axis.

4. In combination with a wheel having an abrasive peripheral surface and being rotatable about a fixed axis, a guard plater disposed perpendicular to said axis adjacent to a side of the wheel and having an arcuate edge projecting outwardly slightly beyond the adjacent peripheral edge of the wheel, mounting means for said plate formed to produce limited free swinging thereof about an axis disposed parallel to the wheel axis toward and away from the latter by work pressed against said abrasive wheel surface, and means for eiecting fixed adjustment of said plate both along the wheel axis and in a direc' tion perpendicular thereto. j

5. In combination with an abrasive wheel rotatable about an axis, a guard plate disposed on each of the opposite sides of the wheel and each having an arcuate edge projecting outwardly slightly beyond the adjacent peripheral wheel edge, and common supporting means `for said plates formed to produce limited simultaneous free movement thereof toward and away from the wheel periphery by work applied to the wheel.

6. In combination with a wheel havingl an abrasive peripheral surface and being rotatable about a iixed axis, a guard plate disposed on each of the opposite sides of the wheel, said guard plates lying in parallel planes perpendicular to the wheel axis and each having an arcuate edge projecting outwardly slightly beyond the adjacent peripheral wheel edge, and common supporting means for said plate formed to produce simultaneous free swinging thereof about an axis disposed parallel to and remote from the wheel axis toward and away from the latter by work applied to the wheel periphery.

'7. In combinationwith an abrasive wheel rotatable about an axis, a guard plate disposed on each of the opposite sides of the wheel and each having an arcuate edge projecting outwardly slightly beyond the adjacent peripheral wheel edge, common supporting means for said plates formed to produce limited simultaneous free movement thereof toward and away from the wheel periphery by work applied to the wheel, and means for effecting independent adjustment of said plates either toward said wheel or its axis.

8. In combination with a wheel having a abrasive peripheral surface and being rotatable about a xed axis, a guard plate dispo-sed on each of the opposite sides of the Wheel, said guard plates lying in parallel planes perpendicular to the wheel axis and each having an arcuate edge projectingy outwardly slightly beyond the adjacent peripheral wheel edge, common supporting means for said plate formed to produce simultaneous free swinging thereof about an axis disposed parallel to and vremote from the wheel axis toward and away from the latter by work applied to the wheel periphery, and means for effecting independent adjustment of each of said plates both along the wheel axis and perpendicular thereto.

9. In combination with an abrasive wheel rotatable about a horizontal axis, a bracket mounted rearwardly of said wheel, a pivot shaft carried by said bracket approximately parallel to the wheel axis, an arcuate guard suspended from said shaft and being disposed closely adjacent to a side of `said wheel but projecting slightly beyond the adjacent \wheel edge, and means carried by said bracket for producing limited free swinging of said guard relative to the wheel axis by work applied to the wheel periphery.

10. In combination with an abrasive wheel rotatable about a fixed horizontal axis, a bracket disposed rearwardly of said wheel, a pivotshaft carried by said bracket parallel to the wheel axis, an arcuate guard suspended from said shaft on 'each side of the wheel and each projecting y slightly beyond the adjacent Wheel edge, and a limit stop carried by said bracket and coacting with only one of Vsaid guards for permitting limited simultaneous free swinging of both guards. i

11. In combination with an abrasive wheel rotatable about a xed horizontal axis, a bracket disposed rearwardly of said wheel, a pivot shaft carried by said bracket parallel to the wheel axis, an arcuate guard suspended from `said shaft on each side of the wheel and each projecting slightly beyond the adjacent wheel edge, and a stop for Hunting the movement of said guards relative to said wheel by work coacting with the latter.

12. In combination with an abrasive wheel rotatable about a xed horizontal axis, a bracket disposed rearwardly of said wheel, a pivot shaft carried by said bracket parallel to the Wheel axis, an arcuate guard suspended from said shaft on each side of the wheel and each projecting slightly beyond the adjacent wheel edge, and an adjustable stop carried by said bracket and coacting with said guards to limit the movement of the latter relative to said wheel by work pressed against the wheel periphery.

CLARENCE L. LOGEMANN. 

